Using NASA's GISTEMP data (a measure of the surface air temperature around the world), climate researcher Antti Lipponen put together this data visualization of global temperature anomalies from 1900-2016. Until about the mid-90s, the lines in different parts of the world pulse blue (cooler) or yellow/red (warmer) each year as regional climate varies...but it slowly turns less blue and more yellow. From 1997 on, the thing is basically an angry red porcupine.